Materials Literature
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ABSTRACT Biodegradable polymer based nanocomposite materials have attracted much attention since they can be used for biomedical and pharmaceutical applications. In order to have highly integrated PLGA nanocomposite materials, silver colloidal nanoparticles were prepared in chloroform starting from silver nitrate and…
The complex impedance spectra of polymer‐derived amorphous silicon oxycarbides synthesized at different temperatures are reported. Analysis of the spectra using equivalent circuit models showed that the conduction of current is dominantly through the matrix and free carbon in series, instead of through the matrix or f…
A number of different gold–silver alloy particles, on a nanometre scale and ranging in size from 13 to 34 nm in diameter (nanoparticles), have been prepared and been investigated as the active elements of optical fiber sensor systems. This includes a gold-rich group with 25% silver and 75% gold (the A25 group) in cont…
Amorphous Ge(x)Te(100-x) alloys were obtained over a broad composition range (12 ≤ x ≤ 44.6) by thermal co-evaporation. Their structure was investigated by x-ray diffraction and extended x-ray absorption fine structure measurements. Experimental datasets were fitted simultaneously by the reverse Monte Carlo simulation…
The effect of carrier concentration on the Fermi level and bandgap renormalization in over 30 indium-doped cadmium oxide (CdO : In) films with carrier concentrations ranging from 1 to 15 × 10 20 cm −3 was studied using the two-band k · p model with electron–electron and electron–ion interactions. It is shown that the…
Group VIII metal oxides, that is, Fe 2 O 3 , Co 2 O 3 , and NiO have been introduced to 0.2 Pb ( Zn 1/3 Nb 2/3 ) O 3 –0.8 Pb ( Zr 0.50 Ti 0.50 ) O 3 ( PZN – PZT ) to deterministically identify the substitution mechanism and meantime to tailor mechanical and piezoelectric properties in obtaining energy harvesting mater…
An unconventional bonding: The presence of interlayer B-H⋅⋅⋅H-N dihydrogen bonds in hydrogenated bilayer BN nanosheets reduces the intrinsic large band gap of the chair-type BN conformation owing to interlayer charge transfer. In contrast, the insulating properties of the thermodynamically more stable stirrup-type bil…
Abstract Current applications of porphyrins in medicine and optics, such as photodynamic therapy or nonlinear absorption, increasingly require the use of far‐red absorbing dyes. Modification of the porphyrin structure to accommodate these conditions can be achieved by extending the conjugation of the porphyrin π syste…
A series of Pt-based heterobimetallic lantern complexes of the form [PtM(SAc)4(OH2)] (M = Co, 1; Ni, 2; Zn, 3) were prepared using a facile, single-step procedure. These hydrated species were reacted with 3-nitropyridine (3-NO2py) to prepare three additional lantern complexes, [PtM(SAc)4(3-NO2py)] (M = Co, 4; Ni, 5; Z…
Abstract Correlated electron oxides prove a diverse landscape of exotic materials' phenomena and properties. One example of such a correlated oxide material is strontium ruthenate (SrRuO3) which is known to be a metallic itinerant ferromagnet and for its widespread utility as a conducting electrode in oxide heterostru…
A study based on photoluminescence and absorption measurements as a function of temperature and pressure for PbSe nanocrystals with sizes in the range 3-13 nm reveals the influence of size quantum confinement on the observed variation. In the case of the temperature variation, the effective bandgap changes from showin…
Four upper rim bis-monopyrrolotetrathiafulvalene-calix[4]arene conjugates 2a,b and 3a,b have been efficiently synthesized using a modular construction approach. The new compounds feature a molecular tweezer architecture with a quasi-parallel arrangement of redox-active tetrathiafulvalene (TTF) arms, which serve as the…
A stochastic constitutive model has been developed that explicitly acknowledges the nanometer size dynamic heterogeneity of glassy materials, where the distribution of the viscoelastic relaxation times emerges naturally as a result of the dynamic heterogeneity. A set of stochastic differential equations for local stre…
In this work, we present results on the structural, electrical, and magnetic properties of pure and half-doped LaCrO3 compounds. It is observed that including Mn the lattice structure changes from orthorhombic to rhombohedral. The electrical transport in LaCrO3 can be described by a band gap model, whereas in La2CrMnO…
The topography of poly (N-isopropyl acrylamide) brushes end-grafted from initiator-terminated monolayers was imaged by atomic force microscopy, as a function of the area per chain and of solvent quality. Measurements were done in air and in water, below and above the lower critical solution temperature. At low graftin…
We present the formation and decay dynamics of a trion (charged exciton) and exciton system in chemically $p$-doped single-walled carbon nanotubes (SWNTs) investigated by time-resolved photoluminescence measurements at 300 K. In (6,5) SWNTs with hole densities in the range of 0.27--1.05 nm${}^{\ensuremath{-}1}$, a tri…
Nowadays, chemically synthesized proteins and peptides are attractive building blocks and have potential in many important applications as biomaterials. In this review, applications of biomaterials to thermotropic liquid crystals are discussed. The review covers the improvement of the performance of liquid crystal dis…
This paper reviews the synthesis and characterization of several transparent glass‐ceramics with optical active nanocrystals. Glass‐ceramics containing ferroelectric S r x B a 1‐x N b 2 O 6 nanocrystals with an ellipsoidal shape show optical phase modulations in the presence of alternative electric fields. In the glas…
A simple and cost-effective method to synthesize the luminescent noble metal clusters (Au and Pt) in chicken egg white aqueous solution at room temperature is reported. The red-emitting Au cluster is used as fluorescent probe for sensitive detection of H2O2.
Abstract An effective method is reported for oxidizing graphene/copper film in which air oxidation of the underlying copper film occurs through the grain boundary lines of graphene without oxidizing graphene. This oxidation is realized by partially immersing the graphene/copper film in sodium chloride solution. Electr…